[[voiceover]] every sunday night, al jazeera america presents gripping films from the world's top documentary directors. >>thank god i didn't suffer what he had to go through. next sunday, the premiere of google and the world brain. >>this is the opportunity of our generation. [[voiceover]] it would be the world's greatest library under one digital roof. but at what cost? >>google could hold the whole world hostage. [[voiceover]] al jazeera america presents google and the world brain.